User interface



FIG. 1 is a perspective view of a user interface showing our design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a first side elevation view thereof;

FIG. 5 is an opposite side elevation view;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in FIG. 3 that are immediately adjacent to the shaded areas represent the bound of the claimed design, while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claim design. 

The ornamental design for a user interface, as shown and described. 